Anchor for dental plates and the like.



F. ROACH.

ANCHOR FOR DENTAL PLATES AND THE LIKE.

APPLICATION FILED SEPT-27. l9l6.

Patented May 22, 1917.

Q M 5Q, git-$ 144 75 9' a? EnvI's E. BOACH, or CHICAGO, ILL INoIs.

ANCHOR FOR DENTAL PLATES AND THE LI E.

To all whom it may concern;

Be it known that I, FINIs E.;RoAorr, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Anchor for Dental Plates and the like, of which the following is a specification.

My invention relates to certain new anduseful improvements in an anchor for dental plates and the like and is fully described and explained in the specification and shown in the accompanying drawing, in which Figure 1 is a bottom plan showing a plate anchored in place with my device; Fig. 2 is a similar view of the mouth and pillarteeth, showing the stationary parts of the device; Fig. 3 is a side elevation of the parts shown in Fig. 1; Fig. 4 is a section on the line't of Fig. 1; Fig. 5 is a section on the line 5 of Fig. 4; and Fig. 6 is a perspective view of that part of the anchoring device which is attached to the plate. I Referring to the drawings, 7 designates the pillar-teeth which are here shown as crowned, but those skilled in the art will understand that any other treatment may be performed upon the pillar-teeth, providing the permanent attaching members for the bridge are secured thereto in the proper manner. These attaching members are pins 8, provided with flattened circular heads 9, the heads, however, being slightly rounded for the purpose hereinafter described. 10 is the plate, which is here shown as partially finished, that is to say, it is not yet supplied with its teeth, although the metal-work is complete. Attached to the ends of the plate adjacent to the pillar-teeth are anchoring devices, the structure of" which is perhaps best shown in Fig. 6. .Each is formed of sheet-metal having a central portion 11 and lateral ears recurved toward the central portion to form a space between themselves and. the central portion, and between their own adjacent edges, a slot. The central portion extends forward so as to close the space between the ears 12 and central portion, and is then continued up in the plane of the ears 12 to form another ear 13. The central portion is bent back at 14 to form a part adapted to be soldered to the bridge.

When the anchoring member is fastened to the bridge, as shown'inthe drawings, it can 'be engaged with the head 9 ofthe pin 8 carried by the pillar-tooth, the head nearly filling the space within the anchoring mem- Specification of Letters Patent. 7

Patented May- 22,191 7.

Application filed September 27, 1916. Serial No. 122,350.

then sufficient play between the anchoring member and the head of the pin to permit all the desirable relative movement between the plate and the gum. This is'pefculiarly important, since it is found in practice that owing to a variety of causes the plate, after being adjusted, may move closer to the jaw, either under heavy pressure or by a slight shrinking of the gum tissue. If a perfectly rigid connection between the anchor tooth and bridge is established, such movement throws a wholly undesirable strain on the anchor tooth, which is avoided with my construction; On the other hand, it is very important to prevent play between the bridge and anchor tooth in the opposite direction, that is, away from the jaw. This is prevented in my device by the ear 13 which bears against the anchor tooth, as shownin Fig. 4, being fitted tightly thereto bv the dentist. The structure is thus such that while the bridge can move toward the jaw without affecting the anchor tooth,'movement in the opposite direction is resisted by the anchor tooth. The mechanical structure through which this result is accomplished is peculiarly simple, the parts can be made in large quantities'at a low price and can be "fastened in place by a single operation.

I realize that considerable variation is possible in the details of the construction herein shown, and I do not intend to limit myself thereto, except as pointed out in the following claims, in which it is my intention to claim all thenovelty inherent in thedevice as broadly as is permitted by the state of the art.

What I claim as new and desire to secure by Letters Patent is:

1. The hereindescribed attachment for plates and the like consisting of two members, a male member adapted to be carried by the pillar-tooth, and provided. with an enlarged head, a female member in the form of a slotted tube slidable overthe head of the male member, and-oscill'atable thereon, and a projection integral with the female member and adapted to bear againstfthe pillar-tooth of that side of the head farthest from the jaw to prevent the oscillation of the female member on the head in one direction. Y

. 2; The hereindescribed attachment for plates and the like, comprising a male member and the shank of thepin lying between ad acent edgesof the ears 12, andthere is ber adapted to be attached to the pillartooth and provided with a flattened head, a female part formed of sheet-metal and adapted for attachment to the plate or the like, said female member comprising a fiat tened tube slotted on the side adjacent to the pillar-tooth to receive the male member, said flattened tube having an integral ear adapted to engage the pillar-tooth to prevent oscillation of the female member on the male member in one direction While permitting such oscillation in another direction.

3. The hereindescribed attachment for plates and the like, comprising a female member adapted for attachment to the plate and comprising a central portion, ears recurved toward the same to form a flattened tube slotted on one side, and a portion closing the end of said tube and extended to form the integral ear substantially in the plane of the slotted face of the flattened tube, and a male member in the form of a pin provided With a flattened and slightly rounded head to enter the female member through the slot, for the purpose aforesaid.

FINIS E. ROAGH.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

